Well this message is just saying that it cant assure you that stack trace is reliable.

Apparently the problem is within Chipmunk library and It seems like you are testing your game in release mode.

Since you are having BAD_ACCESS error it is likely to be a deallocation problem, try use instruments to see why it happens. Also, look through chipmunk topics on both this and spritebuilder forums and see how common problems are being solved with adding some flags like -fno-fast-math or something.

But my guess is that it is either bug inside Chipmunk or you messed up somewhere with deallocation.